Patents by Inventor Ikuo Kushiro
Ikuo Kushiro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11279399Abstract: An electric power steering apparatus includes left and right swing arm members, right and left tie rods pivotally connected at inner ends to arm portions of the swing arm members via a relay rod pivotally connected to the arm portions at both ends, a rack-and-pinion device in which one end of a rack bar is connected to the arm portion of one of the swing arm members, and a steering input transmission system that transmits a steering input to the rack-and-pinion device. An electric steering assist force applying device is connected to the arm portion of the other swing arm member, and applies a force to assist the other swing arm member to swing.Type: GrantFiled: March 11, 2020Date of Patent: March 22, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Toyoda, Ruriko Sakaguchi, Ikuo Kushiro, Hironobu Fukuta
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Publication number: 20200290663Abstract: A steering apparatus includes left and right swing arm members, right and left tie rods pivotally connected at inner ends to arm portions of the swing arm members via a relay rod pivotally connected to the arm portions at both ends, a rack-and-pinion device in which one end of a rack bar is connected to the arm portion of one of the swing arm members, and a steering input transmission system that transmits a steering input to the rack-and-pinion device. The rack-and-pinion device includes a pair of pressing devices disposed on both sides of the pinion along the longitudinal direction of the rack bar and pressing the rack bar against the pinion.Type: ApplicationFiled: March 11, 2020Publication date: September 17, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki TOYODA, Ruriko SAKAGUCHI, Ikuo KUSHIRO, Hironobu FUKUTA
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Publication number: 20200290665Abstract: An electric power steering apparatus includes left and right swing arm members, right and left tie rods pivotally connected at inner ends to arm portions of the swing arm members via a relay rod pivotally connected to the arm portions at both ends, a rack-and-pinion device in which one end of a rack bar is connected to the arm portion of one of the swing arm members, and a steering input transmission system that transmits a steering input to the rack-and-pinion device. An electric steering assist force applying device is connected to the arm portion of the other swing arm member, and applies a force to assist the other swing arm member to swing.Type: ApplicationFiled: March 11, 2020Publication date: September 17, 2020Applicant: Toyota Jidosha Kabushiki KaishaInventors: Hiroyuki Toyoda, Ruriko Sakaguchi, Ikuo Kushiro, Hironobu Fukuta
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Patent number: 9656686Abstract: A drive supporting device includes a supporting device mounted on a vehicle and capable of executing driving support in the vehicle; a steering angle detecting device configured to detect a steering angle of a steering member of the vehicle; a torque detecting device configured to detect a torque acting on a steering shaft portion that rotates with the steering member; and a controller configured to control the supporting device, wherein the controller changes content of the driving support by the supporting device between a case in which a steering power corresponding to a product of a parameter associated with the steering angle detected by the steering angle detecting device and a parameter associated with the torque detected by the torque detecting device is greater than or equal to a reference value set in advance, and a case in which the steering power is smaller than the reference value.Type: GrantFiled: December 7, 2012Date of Patent: May 23, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoji Kunihiro, Takeshi Goto, Yoshiaki Suzuki, Ikuo Kushiro, Kimiaki Ono
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Publication number: 20150284022Abstract: A steering control device includes a vibration suppression control unit configured to suppress transmission of vibration of a steering system including a steering wheel and a turning wheel, which are mechanically connected to each other, to the steering wheel. The vibration suppression control unit is configured to execute, at a time a braking force is generated on the turning wheel, suppression control of braking time vibration associated with braking operation of the turning wheel based on a value in a predetermined frequency band of a brake fluid pressure of the turning wheel.Type: ApplicationFiled: November 5, 2012Publication date: October 8, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshio Kudo, Yoshiaki Suzuki, Yoji Kunihiro, Ikuo Kushiro, Takeshi Goto
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Publication number: 20150274201Abstract: A drive supporting device includes a supporting device mounted on a vehicle and capable of executing driving support in the vehicle; a steering angle detecting device configured to detect a steering angle of a steering member of the vehicle; a torque detecting device configured to detect a torque acting on a steering shaft portion that rotates with the steering member; and a controller configured to control the supporting device, wherein the controller changes content of the driving support by the supporting device between a case in which a steering power corresponding to a product of a parameter associated with the steering angle detected by the steering angle detecting device and a parameter associated with the torque detected by the torque detecting device is greater than or equal to a reference value set in advance, and a case in which the steering power is smaller than the reference value.Type: ApplicationFiled: December 7, 2012Publication date: October 1, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoji Kunihiro, Takeshi Goto, Yoshiaki Suzuki, Ikuo Kushiro, Kimiaki Ono
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Patent number: 9090280Abstract: A power steering device is mounted on a vehicle and includes a variable transmission ratio mechanism, a torque applying unit, and an applied friction torque changing unit. The torque applying unit sets an applied friction torque applied to the steering wheel and performs a control of applying the applied friction torque to the steering wheel. The applied friction torque changing unit changes the applied friction torque based on the transmission ratio of the variable transmission ratio mechanism.Type: GrantFiled: December 26, 2008Date of Patent: July 28, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kimiaki Ono, Ikuo Kushiro
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Patent number: 8874308Abstract: A power steering device is mounted on a vehicle and includes a variable transmission ratio mechanism, a torque applying unit, and an applied friction torque changing unit. The torque applying unit sets an applied friction torque applied to the steering wheel and performs a control of applying the applied friction torque to the steering wheel. The applied friction torque changing unit changes the applied friction torque based on the transmission ratio of the variable transmission ratio mechanism.Type: GrantFiled: December 26, 2008Date of Patent: October 28, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kimiaki Ono, Ikuo Kushiro
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Patent number: 8718873Abstract: An object of the present invention is to provide an electric power steering device which reduces the variation of viscous feeling due to the change of steering velocity and presents better steering feeling than conventional power steering devices. A basic assist torque Tab and the like are calculated; filter parameters such as time constant Tn are calculated; and a gain Gs is calculated. A steering velocity s·? is calculated and a correction torque Tcmps is calculated as a product of a gain Gs and a value obtained by filtering steering velocity s·? with a filter of second-order lag and first-order advance. Further, a final target assist torque Ta is calculated by summing a basic assist torque Tab and the like and a correction torque Tcmps, and a steering assist torque is controlled so that it conforms to the final target assist torque Ta.Type: GrantFiled: August 6, 2008Date of Patent: May 6, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventor: Ikuo Kushiro
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Patent number: 8548681Abstract: A power steering device is mounted on a vehicle and includes a torque applying unit and an applied friction torque changing unit. The torque applying unit sets an applied friction torque applied to a steering wheel based on a real steering angle and a target steering angle, and performs a control of applying the applied friction torque to the steering wheel. The applied friction torque changing unit changes the applied friction torque based on a load condition of the vehicle.Type: GrantFiled: December 26, 2008Date of Patent: October 1, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Ikuo Kushiro, Kimiaki Ono
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Patent number: 8509995Abstract: A power steering device sets an applied friction torque applied to a steering wheel based on a real steering angle and a target steering angle, and performs a control of applying the applied friction torque to the steering wheel. An applied friction torque changing unit changes the applied friction torque, which is calculated from the real steering angle and the target steering angle, when the vehicle reverses. Concretely, the unit changes the applied friction torque to a smaller value when the vehicle reverses than that when the vehicle advances. Thereby, it is possible to decrease the applied friction torque properly when the vehicle reverses, and it become possible to improve the maneuverability of the steering wheel.Type: GrantFiled: December 26, 2008Date of Patent: August 13, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kimiaki Ono, Ikuo Kushiro
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Publication number: 20120298268Abstract: There are provided a method and a device to suppress the formation of a flat spot or to lessen the extent of a flat spot in a tire of a vehicle such as automobile by applying to a belt of the tire on a ground contact area of the tire a bending moment in the direction that the opposite sides of the belt are directed outward in the radial direction of the tire to suppress the formation of a deflection due to the compression of a carcass cord on the tire ground contact area In order to apply such a bending moment, a projection member narrower than the tread of the tire is disposed on the surface touching the tire of a vehicle when it is stopped or parked, pressing the tread of the tire.Type: ApplicationFiled: March 19, 2010Publication date: November 29, 2012Applicant: Toyota Jidosha Kabushiki KaishaInventors: Masashi Igarashi, Ikuo Kushiro
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Publication number: 20110231065Abstract: A power steering device is mounted on a vehicle and includes a torque applying unit and an applied friction torque changing unit. The torque applying unit sets an applied friction torque applied to a steering wheel based on a real steering angle and a target steering angle, and performs a control of applying the applied friction torque to the steering wheel. The applied friction torque changing unit changes the applied friction torque based on a load condition of the vehicle.Type: ApplicationFiled: December 26, 2008Publication date: September 22, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ikuo Kushiro, Kimiaki Ono
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Publication number: 20110218708Abstract: A power steering device sets an applied friction torque applied to a steering wheel based on a real steering angle and a target steering angle, and performs a control of applying the applied friction torque to the steering wheel. An applied friction torque changing unit changes the applied friction torque, which is calculated from the real steering angle and the target steering angle, when the vehicle reverses. Concretely, the unit changes the applied friction torque to a smaller value when the vehicle reverses than that when the vehicle advances. Thereby, it is possible to decrease the applied friction torque properly when the vehicle reverses, and it become possible to improve the maneuverability of the steering wheel.Type: ApplicationFiled: December 26, 2008Publication date: September 8, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kimiaki Ono, Ikuo Kushiro
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Publication number: 20110209939Abstract: A power steering device is mounted on a vehicle and includes a variable transmission ratio mechanism, a torque applying unit, and an applied friction torque changing unit. The torque applying unit sets an applied friction torque applied to the steering wheel and performs a control of applying the applied friction torque to the steering wheel. The applied friction torque changing unit changes the applied friction torque based on the transmission ratio of the variable transmission ratio mechanism.Type: ApplicationFiled: December 26, 2008Publication date: September 1, 2011Inventors: Kimiaki Ono, Ikuo Kushiro
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Publication number: 20100211262Abstract: An object of the present invention is to provide an electric power steering device which reduces the variation of viscous feeling due to the change of steering velocity and presents better steering feeling than conventional power steering devices. A basic assist torque Tab and the like are calculated; filter parameters such as time constant Tn are calculated; and a gain Gs is calculated. A steering velocity s·? is calculated and a correction torque Tcmps is calculated as a product of a gain Gs and a value obtained by filtering steering velocity s·? with a filter of second-order lag and first-order advance. Further, a final target assist torque Ta is calculated by summing a basic assist torque Tab and the like and a correction torque Tcmps, and a steering assist torque is controlled so that it conforms to the final target assist torque Ta.Type: ApplicationFiled: August 6, 2008Publication date: August 19, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Ikuo Kushiro
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Patent number: 5303793Abstract: A power steering apparatus of rack-and-pinion type comprising an input shaft steered by a driver, an output shaft operatively connected to a rack bar through a rack-and-pinion gear mechanism, a hydraulic cylinder operatively connected to the rack bar, and a rotary valve operatively connected to the input shaft. The steering apparatus further comprises an intermediate rotary member disposed between the input shaft and output shaft for rotation about an axis offset from the rotational axis of the output shaft, and a reduction gear mechanism arranged between the rotary valve and the intermediate rotary member. A cam mechanism is disposed between the intermediate rotary member and the output shaft for transmitting the rotation of the intermediate rotary member to the output shaft.Type: GrantFiled: June 26, 1992Date of Patent: April 19, 1994Assignee: Toyoda Koki Kabushiki KaishaInventors: Kiyotaka Kato, Shiro Takeuchi, Masanori Natsume, Seiji Kawakami, Ikuo Kushiro, Satoru Niwa